Power tool attachment for cutting kerf for weatherstripping



April 1955 P. L. MOELLER 2,705,513

POWER TOOL ATTACHMENT FOR CUTTING KERF FOR WEATHERSTRIPPING Filed 001:. 12, 1953 2 Sheets-Sheet 1 L III ITIIIIIf/II/A JNVENTOR. PEEL L. MOELLER HIS ATTORNEYS April 5, 1955 P. L. MOELLER 2,705,513v

POWER TOOL ATTACHMENT FOR CUTTING KERF FOR'WEATHERSTRIPPING Filed Oct. 12, 1953 2 Sheetsdheet 2 INVENTOR. PEEL L. MOELLE/Z HIS ATTORNEYS United States Patent POWER TOOL ATTACHMENT FOR CUTTING KERF FOR WEATHERSTRIPPING Peel L. Moeller, San Jose, Calif.

Application October 12, 1953, Serial No. 385,439 Claims. (Cl. 144-136) This invention relates to attachments for power tools and more particularly to a power tool attachment for cutting a kerf in a door or window jamb or the edge of a window or door for the reception of Weatherstripping or the like.

It is well known that weather stripping is applied to door or window jambs after they have been installed, with the doors and/or windows hung in them. Usually a suitable lapse of time is allowed for shrinkage and warping of the jambs and sash before they are weather stripped. Moreover, window and door frames are made in various shapes and designs and seldom is there a situation in which all frames and sashes are uniform even in one dwelling or edifice. To this end the attachment embodying the present invention has as an object to construct and arrange a kerf cutting head relative to the power tool by which it is driven so as to adapt the same for cutting kerfs into various shapes and styles of door or window jambs.

Another object is to provide an attachment adapted for sliding adjustment axially on the body of the power tool with which it is associated. Another object is to provide a kerf cutting tool attachment with a guide adjustable radially relative to the axis of the cutting tool for setting the latter for a predetermined depth of cut.

These and other objects and advantages of the present invention will appear more fully in the following description and drawings in which:

Fig. l is a fragmentary perspective view of a doorway having a power tool and attachment embodying the present invention shown in phantom on one jamb.

Fig. 2 is a perspective view of a power tool and attachment embodying the present invention.

Fig. 3 is a cutting head end view of the attachment shown in Fig. 2.

Fig. 4 is a partial longitudinal section of the cutting head end of the power tool and attachment shown in Figs. 2 and 3 and taken substantially along line 4--4 of Fig. 3.

Fig. 5 is a perspective view of a power tool and modified form of attachment embodying the present invention.

Fig. 6 is a partial longitudinal section of the cutting head end of the power tool and attachment shown in Fig. 5 and taken along line 66 thereof.

Fig. 7 is a detail section of the jamb and a door or sash edge associated therewith showing one form of installation of weather stripping therefor.

Referring to the drawings, Fig. 1 is illustrative of a door frame 10 about to receive treatment incident to installation of weather stripping thereto. As is well known, the door frame 10 includes a door jamb consisting of a flat side rail 11 into which one side 12 of a pair of hinge wings 13 are set, the other side 14 of which wings are set into the edge 15 of a door 16 as best illustrated in Fig. 4. When the door 16 is hung on the frame 10 the hinge Wings are joined by a hinge pin (not shown) and a stop 17 is applied to the side rails as well as the head rail 18 to keep the door from swinging through the opening provided by the door frame.

The application of Weatherstripping to the above described door and frame is best accomplished by cutting a kerf 19 into the jamb rail 11 adjacent the stop 17 as best illustrated in Fig. 7. Another kerf 20 must then be cut into the edge 15 of the door 16 which kerf 20 is preferably somewhat offset relative to that face 21 of the door which engages the stop 17 (see also Fig. 7 for illustration).

It is often diflicult to cut the kerfs 19 and 20 at the places desired when the door or a sash is hung within the frame 10. Moreover, the thickness of the stop 17 may vary on different installations and therefore considerable tune is consumed in making an installation of weather stripping.

While it is not new to use power tools for the purpose ofcutting kerfs such as the ones 19 and 20 illustrated, the present invention has to do with certain novel improvements in attachments for such power tools and in this case the invention is embodied in the attachment 25 of Figs. 1 to 4 inclusive and the modified form of the attachment shown in Figs. 5 through 7 in the drawings. Since both of these devices are similar in character like reference numerals will designate like parts therein, prime numerals being used on the modified. form of Figs. 5 through 7 to distinguish them from the parts shown in Figs. 1 to 4, inclusive.

The power tool T illustrated is of conventional design having a cylindrical barrel-like body or housing 26 which may be held in one hand or which may be provided with a pistol grip handle 27 as shown in Fig. 2. The attachment 25 embodying the present invention comprises in general a sleeve-like body 30 split as at 31 along one side and provided with ears 3233 bored to receive a bolt 35 having a wing nut or thumb nut 36 associated therewith. The sleeve-like body 30 is adapted to slidingly fit over the cylindrical body or housing 26 of the power tool T for sliding adjustment axially thereof. In this manner the front face 37 of the attachment moves forward and/ or backward relative to the tool, for example the disc saw 38 on the chuck end of the power tool T. In this connection it will be noted that the sleeve-like body 30 is adapted to be secured in desired positions of adjustment relative to the housing 26 of the power tool. To accomplish this the wing nut 36 is tightened down upon the bolt 6 35. In addition to the foregoing a set: screw 39 is provided in the sleeve body 30 for securing the latter in desired position, longitudinally of the power tool housing.

The front face 37 of the attachment is provided with a flange 40 which partially circumscribes the tool 38. The front face 37 and the flange 40 is provided with a milled surface upon which a guide 41 is adapted to be mounted. This guide 41 comprises a mounting plate 42 conforming in shape to the flange 40 on the front face of the sleevelike body 30. The mounting plate 42 is provided with a pair of elongated slots 4343 parallel to each other and parallel with respect to a plane extending radially from the axis A of the sleeve-like body and the power tool T confined therein. A pair of bolts 4444 have their head ends disposed on the back side of the flange 40 and extend through suitable holes formed in the latter. The threaded ends of these bolts 4444 extend through the slots 43-43 formed in the mounting plate 42 and receive wing nuts 45--45 whereby the guide 41 can be secured in desired positions of radial adjustment relative to the axis A of the sleeve body and power tool.

In the case of the preferred form illustrated in Figs. 2, 3 and 4 the guide 41 comprises a pair of flanges 46-46, one on either side of the axis A and spaced from each other sufficiently to permit the disc saw 38 to pass between their inner ends. These flanges 46-46 consist of right angle wall members, one 47 of which is adapted to glide upon the jamb rail 11 or door edge and the other 48 is adapted to engage the stop 17 or face of the door or sash for guiding the disc saw in parallel relation relative thereto.

The mounting plate 42 of the preferred form is formed integrally with an arcuate flange 49 which extends out to the extreme fore edge of the wall member 47 of the guide. The flange 49 has a plurality of tapped bosses 50 formed therewith adapted to receive stud screws 51 extending through suitable holes provided in a cover plate 52. I1 this manner the arcuate flange 49 serves to structura ly support the inner ends of the two wall members 47 while the other wall members 48 are in effect an extension of the mounting plate 42. Moreover, the arcuate flange 49 and cover plate 52 form a guard housing 53, over the moving part (disc saw 38) of the power tool T.

In the modified form shown in Figs. 5 and 6 the arrangement is similar in that the mounting plate 42 is formed integrally with the guard housing 53 and with a pair of forks parallelly slotted as at 43'-43' to receive the stud bolts 44'44 which extend from the back side of the flange 40 formed on the front face 37' of the sleeve-like body 30'. As in the preferred form so in the modification thereof the guide 41 comprises a pair of work engaging wall members 47 and 48' disposed at right angles to each other. The wall members 47 are formed on the open upper edge of the housing 53 and the wall members 48 are a pair of projections 46'46 formed forwardly of the mounting flange 42 for engaging the edge of a door, sash or stop.

From the foregoing it will be apparent that in both forms disclosed the guides 41 or 41' function identically and in each case the housing 53 or 53' forms a guard around the disc saw 38. In either form of the invention it will be noted that the plane in which the disc saw is disposed and the axis A of both the saw and power tool are the focal points about and relative to which adjustments are to be made. Such adjustments relate to the depth of cut as well as the spacing of the kerf from a door stop and/or a door or sash edge.

As best seen in Figs. 1 and 6 when the wall members 47 and 48 (47' and 48) engage the edge and/or face of a stop 17 the disc saw 38 can be shifted laterally relative to the edge of the stop by loosening the set screw 39 and wing nut 36 or 36' so as to permit shifting of the power tool body 26 axially of the sleeve like body 30 or 30. When the plane in which the saw 38 revolves is set as desired the set screws and wing nuts are secured tigl'itly to fix the sleeve-like body relative to the power too T.

In making an installation the depth of kerf made by the saw 38 into a jamb rail or door or sash edge becomes critical because it is essential that the free ends of the Weatherstripping inserted in the kerf engage each other. That is to say, the Weatherstripping should be bottomed in the kerf so that the free ends of the weatherstrips frictionally engage each other.

To attain the proper depth of cut the whole guide and guard structure 41--53 (41'53) is adjusted radially toward or from the axis A of the saw 38. This is accomplished by loosening the wing nuts 45-45 (45'--45) to free the mounting plate 42 or 42 for sliding movement upon the front face 3737 of the sleeve-like body Since the slots 4343 (43--43') are parallel to each other and to an imaginary line extending radially from the axis A the guide or guard can only move along that radial line either toward or from the axis A.

In connection with the foregoing it will be seen that the attachmentembodying the present invention-is adapted for use on various styles and types of door or window frames for cutting kerfs therein for various kinds and forms of Weatherstripping. It should be noted in Fig. 4 particularly that with a proper or metal cutting disc. saw the kerf can be cut through a hinge wing 13 whether it be on the door edge or on the jamb rail of the frame. This enables the installation of Weatherstripping continuously around a door or window frame so that no gaps occur where drafts might leak through.

Having thus described my improved power tool attachment in specific detail it will be appreciated that the same is susceptible to variations, modifications and alterations without departing from the spirit of my invention. I, therefore, desire to avail myself of all variations, modifications and/or alterations fairly coming within the purview of the appended claims.

What I claim as new and desire to protect by Letters Patent is:

1. An attachment for power tools having a substantially cylindrical housing and a disc saw at the chuck end of said housing and axially of said housing, comprising a sleeve-like body adapted to slidingly receive the housing of said power tool, said sleeve-like body having a front face disposed in the region of said disc saw and in a plane parallel to the plane of rotation thereof, a guide on the front face of said sleeve-like body comprising work engaging walls disposed transverse to the axis of the disc saw and offset relative thereto for engaging the surface of material to be cut by the saw, and means for securing said sleeve-like body on the housing of said power tool.

2. An attachment for power tools having a substantially cylindrical housing and a disc saw at the chuck end of said housing and axially of said housing, comprising a sleeve-like body adapted to slidingly receive the housing of said power tool, said sleeve-like body having a flange on its front end adjacent said disc saw and in a plane parallel to the plane of rotation thereof, a guide comprising work engaging walls disposed transverse to the axis of the disc saw and offset relative thereto, for engaging the surface of material to be cut by the saw, and means for securing said guide on the front flange of said sleeve-like body.

3. An attachment for power tools having a substantially cylindrical housing and a disc saw at the chuck end of said housing and axially of said housing, comprising a sleeve-like body adapted to slidingly receive the housing of said power tool, said sleeve-like body having a flange on its front end disposed in the region of ,said disc saw and in a plane parallel to the plane of rotation thereof, a guide including work engaging walls disposed transverse to the axis of the disc saw and offset relative thereto for engaging the surface of material to be cut by the saw, means for securing said guide to the front flange of said sleeve-like body, and means for securing said sleeve-like body on the housing of said power tool.

4. An attachment for power tools having a substantially cylindrical housing and a disc saw at the chuck end of said housing and axially of said housing, comprising a sleeve-like body split in a plane radially of its axis for sliding fit upon the housing of said power tool, said sleeve-like body having a flange on its front end in the region of said disc saw and in a plane parallel to the plane of rotation thereof, a pair of stud bolts secured tosaid front flange and extending forwardly thereof, and equidistant from the axis of said sleeve-like body, a guide including a flange comparable to said front flange having a pair of parallel slots formed therein for receiving the stud bolts extending from said front flange, means on the free ends of said stud bolts for securing said guide to the front flange of said sleeve-like body, said guide having work engaging walls disposed transverse to the axis of the disc saw and offset relative thereto, for engaging the surface of material to be cut by the saw, and means for seclllring said sleeve-like body on the housing of said power too Y 5. An attachment for power tools having a substantially cylindrical housing and a disc saw at the chuck end of said housing and axially of said housing, comprising a sleeve-like body split in a plane radially of its axis for sliding fit upon the housing of said power tool, said sleeve-like body having a flange on its front end in the region of said disc saw and in a plane parallel to the plane of rotation thereof, a pair of stud bolts secured to said front flange and extending forwardly thereof, and equidistant from the axis of said sleeve-like body, a guide including a flange comparable to said front flange having a pair of parallel slots formed therein for receiving the stud bolts extending from said front flange, means on the free ends of said stud bolts for securing said guide to the front flange of said sleeve-like body, said guide having work engaging walls disposed transverse to the axis of the disc saw and offset relative thereto for engaging the surface of material to be cut by the saw, a pair of ears formed on said sleeve like body on either side of the split formed therein, a bolt extending through said ears and means on said bolt for drawing said sleeve-like body tightly around the housing of said power tool.

References Cited in the file of this patent UNITED STATES PATENTS 1,174,890 Naylor Mar. 7, 1916 1,708,345 Wodack et al Apr. 9, 1929 1,883,392 Moll Oct. 18, 1932 1,899,883 Sacrey Feb. 28, 1933 2,623,557 Kendall Dec. 30, 1952 2,635,655 Linstead Apr. 21, 1953 

